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ghorycon

China
4 Posts
Posted - 02/24/2012 :  02:49:12 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. : 7.5
Operating System:win XP
Hello, i'm very new to origin and am having a few troubles.
I tried the following funciton
Parameters: y0,xc, w, A
Indep var: x
Dep var: y
Function code:
y = y0 + 4*A*exp(-z)/(1+exp(-z))^2
z = (x-xc)/w
After compiling,the error is shown by "Variable "z" not declared".
I want to know how to declare the Variable "z".?
Please advice!!! Really need the help!!!

easwar

USA
1964 Posts
Posted - 02/24/2012 :  10:58:15 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

Try changing to:

double z = (x-xc)/w;
y = y0 + 4*A*exp(-z)/(1+exp(-z))^2;

Easwar
OriginLab
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ghorycon

China
4 Posts
Posted - 02/25/2012 :  7:49:32 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Easwar,
It works now successfully ! Thank you very much for your attention!
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